H3C S5500-HI Switch Series User manual

H3C S5500-HI Switch Series
Fundamentals Configuration Guide
Hangzhou H3C Technologies Co., Ltd.
http://www.h3c.com
Software version: Release 52xx
Document version: 6W102-20131220

Copyright © 2013, Hangzhou H3C Technologies Co., Ltd. and its licensors
All rights reserved
No part of this manual may be reproduced or transmitted in any form or by any means without prior
written consent of Hangzhou H3C Technologies Co., Ltd.
Trademarks
H3C, , H3CS, H3CIE, H3CNE, Aolynk, , H3Care, , IRF, NetPilot, Netflow,
SecEngine, SecPath, SecCenter, SecBlade, Comware, ITCMM and HUASAN are trademarks of
Hangzhou H3C Technologies Co., Ltd.
All other trademarks that may be mentioned in this manual are the property of their respective owners
Notice
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.

Preface
The H3C S5500-HI documentation set includes 11 configuration guides, which describe the software
features for the H3C S5500-HI Switch Series and guide you through the software configuration
procedures. These configuration guides also provide configuration examples to help you apply software
features to different network scenarios.
The Fundamentals Configuration Guide describes how to configure the command line interface (CLI), log
in to the switch, perform file management, configuration file management, and device management for
your switch, upgrade the software, ISSU and perform automatic configuration.
This preface includes:
•Audience
•Added and modified features
•Conventions
•About the H3C S5500-HI documentation set
•Obtaining documentation
•Technical support
•Documentation feedback
Audience
This documentation is intended for:
•Network planners
•Field technical support and servicing engineers
•Network administrators working with the S5500-HI series
Added and modified features
This documentation set is for Release 52xx. The following describes the feature changes between
releases:
•Release 5206 has the following feature changes over Release 5203:
Confi
g
uration
g
uide Added and modified features
FTP and TFTP Added features: Associating an SSL server policy with the FTP service
•Release 5203 has the following feature changes over Release 5101:

Confi
g
uration
g
uide Added and modified features
CLI Modified feature: a password configured by the super password command
for user privilege level switching can be hashed.
Login management
Added features:
•Setting the DSCP value for outgoing IPv4 or IPv6 HTTP packets.
•Setting the DSCP value for IPv4 or IPv6 packets sent by the Telnet client.
•Setting the DSCP value for IPv4 or IPv6 packets sent by the Telnet server.
Modified feature:a password configured by the set authentication password
command for local authentication can now be hashed.
FTP and TFTP
Added features:
•Setting the DSCP value for IPv4 packets sent by the FTP server.
•Setting the DSCP value for IPv4 or IPv6 packets sent by the TFTP client.
Setting the DSCP value for IPv4 and IPv6 packets sent by the FTP client.
File system management Added feature: Verifying the correctness and integrity of the file
Configuration file
management
Added feature:
•Automatic configuration file backup for software downgrading.
Default configuration
Software upgrade N/A
ISSU N/A
Device management Added feature: Disabling password recovery capacity
Removed feature: Disabling Boot ROM access
Automatic configuration N/A
Conventions
This section describes the conventions used in this documentation set.
Command conventions
Convention Descri
p
tion
Boldface Bold text represents commands and keywords that you enter literally as shown.
Italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars, from which
you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical bars, from
which you select one or none.
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by vertical
bars, from which you select at least one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optional syntax choices separated by vertical
bars, from which you select one choice, multiple choices, or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&) sign can

be entered 1 to n times.
# A line that starts with a pound (#) sign is comments.
GUI conventions
Convention Descri
p
tion
Boldface Window names, button names, field names, and menu items are in Boldface. For
example, the New User window appears; click OK.
> Multi-level menus are separated by angle brackets. For example, File > Create > Folder.
Convention Descri
p
tion
< > Button names are inside angle brackets. For example, click <OK>.
[ ] Window names, menu items, data table and field names are inside square brackets. For
example, pop up the [New User] window.
/ Multi-level menus are separated by forward slashes. For example, [File/Create/Folder].
Symbols
Convention Descri
p
tion
WARNING An alert that calls attention to important information that if not understood or followed can
result in personal injury.
CAUTION An alert that calls attention to important information that if not understood or followed can
result in data loss, data corruption, or damage to hardware or software.
IMPORTANT An alert that calls attention to essential information.
NOTE An alert that contains additional or supplementary information.
TIP An alert that provides helpful information.
Network topology icons
Represents a generic network device, such as a router, switch, or firewall.
Represents a routing-capable device, such as a router or Layer 3 switch.
Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that supports
Layer 2 forwarding and other Layer 2 features.
Port numbering in examples
The port numbers in this document are for illustration only and might be unavailable on your device.
About the H3C S5500-HI documentation set
The H3C S5500-HI documentation set includes:

Cate
g
or
y
Documents Pur
p
oses
Product
description and
specifications
Marketing brochure Describe product specifications and benefits.
Technology white papers Provide an in-depth description of software features and
technologies.
Hardware
specifications and
installation
Compliance and safety
manual
CE DOCs
Provide regulatory information and the safety instructions
that must be followed during installation.
Installation quick start Guides you through initial installation and setup
procedures to help you quickly set up your device.
Installation guide Provides a complete guide to switch installation and
specifications.
LSPM1FAN and
LSPM1FANB Installation
Manual
Describes the appearances, specifications, installation,
and removal of the pluggable fan modules available for
the products.
User manuals for power
modules
Describe the specifications, installation, and replacement
of hot swappable power modules.
RPS Ordering Information
for H3C Low-End Ethernet
Switches
Helps you order RPSs for switches that can work with an
RPS.
User manuals for RPSs Describe the specifications, installation, and replacement
of RPSs.
User manuals for interface
cards
Describe the specifications, installation, and replacement
of expansion interface cards.
H3C Low End Series
Ethernet Switches Pluggable
Modules Manual
Describes the specifications of pluggable transceiver
modules.
Pluggable SFP[SFP+][XFP]
Transceiver Modules
Installation Guide
Describe the installation, and replacement of
SFP/SFP+/XFP transceiver modules.
Software
configuration
Configuration guides Describe software features and configuration procedures.
Command references Provide a quick reference to all available commands.
Operations and
maintenance Release notes
Provide information about the product release, including
the version history, hardware and software compatibility
matrix, version upgrade information, technical support
information, and software upgrading.
Obtaining documentation
You can access the most up-to-date H3C product documentation on the World Wide Web
at http://www.h3c.com.
Click the links on the top navigation bar to obtain different categories of product documentation:
[Technical Support & Documents > Technical Documents] – Provides hardware installation, software
upgrading, and software feature configuration and maintenance documentation.

[Products & Solutions] – Provides information about products and technologies, as well as solutions.
[Technical Support & Documents > Software Download] – Provides the documentation released with the
software version.
Technical support
servi[email protected]
http://www.h3c.com
Documentation feedback
You can e-mail your comments about product documentation to inf[email protected].
We appreciate your comments.

i
Contents
Using the CLI ································································································································································ 1
Logging in to the CLI·························································································································································1
Command conventions ·····················································································································································1
Using the undo form of a command ·······························································································································2
CLI views ············································································································································································2
Entering system view from user view······················································································································3
Returning to the upper-level view from any view ··································································································3
Returning to user view from any other view ··········································································································3
Accessing the CLI online help··········································································································································4
Entering a command·························································································································································5
Editing a command line···········································································································································5
Entering a STRING type value for an argument····································································································5
Abbreviating commands··········································································································································5
Configuring and using command keyword aliases······························································································6
Configuring and using hotkeys·······························································································································6
Enabling redisplaying entered-but-not-submitted commands ···············································································8
Understanding command-line error messages···············································································································8
Using the command history function ·······························································································································9
Viewing history commands ·····································································································································9
Setting the command history buffer size for user interfaces ················································································9
Controlling the CLI output·············································································································································· 10
Pausing between screens of output ····················································································································· 10
Filtering the output from a display command····································································································· 10
Configuring user privilege and command levels ········································································································ 13
Configuring a user privilege level ······················································································································· 13
Switching the user privilege level ························································································································ 17
Changing the level of a command······················································································································ 19
Saving the running configuration ································································································································· 20
Displaying and maintaining CLI ··································································································································· 20
Login overview ···························································································································································21
Login methods at a glance············································································································································ 21
User interfaces································································································································································ 22
User interface assignment····································································································································· 22
User interface identification ································································································································· 22
Logging in to the CLI··················································································································································23
FIPS compliance ····························································································································································· 23
Logging in through the console port for the first time································································································· 23
Configuring console login control settings·········································································································· 25
Configuring none authentication for console login (not supported in FIPS mode) ········································· 26
Configuring password authentication for console login (not supported in FIPS mode)································· 27
Configuring scheme authentication for console login ······················································································· 27
Configuring common console login settings (optional) ····················································································· 29
Logging in through Telnet (not supported in FIPS mode) ··························································································· 31
Configuring none authentication for Telnet login ······························································································ 32
Configuring password authentication for Telnet login ······················································································ 33
Configuring scheme authentication for Telnet login ·························································································· 34
Configuring common settings for VTY user interfaces (optional)······································································ 36
Using the device to log in to a Telnet server ······································································································ 37

ii
Setting the DSCP value for IP to use for outgoing Telnet packets ···································································· 38
Logging in through SSH ················································································································································ 38
Configuring the SSH server on the device·········································································································· 39
Using the device as an SSH client to log in to the SSH server········································································· 41
Modem dial-in through the console port······················································································································ 42
Setting up the configuration environment ··········································································································· 43
Configuring none authentication for modem dial-in (not supported in FIPS mode) ······································· 46
Configuring password authentication for modem dial-in (not supported in FIPS mode) ······························· 46
Configuring scheme authentication for modem dial-in······················································································ 46
Configuring common settings for modem dial-in (optional)·············································································· 48
Displaying and maintaining CLI login ························································································································· 50
Logging in to the Web interface·······························································································································52
FIPS compliance ····························································································································································· 52
Configuring HTTP login ················································································································································· 52
Configuring HTTPS login ··············································································································································· 54
Displaying and maintaining Web login ······················································································································ 56
HTTP login configuration example ······························································································································· 56
Network requirements··········································································································································· 56
Configuration procedure ······································································································································ 56
HTTPS login configuration example ····························································································································· 57
Network requirements··········································································································································· 57
Configuration procedure ······································································································································ 58
Logging in through SNMP·········································································································································60
Configuring SNMP login··············································································································································· 60
Prerequisites ··························································································································································· 60
Configuring SNMPv3 settings······························································································································ 60
Configuring SNMPv1 or SNMPv2c settings······································································································· 61
NMS login example······················································································································································· 62
Network requirements··········································································································································· 62
Configuration procedure ······································································································································ 62
Controlling user logins···············································································································································63
Controlling Telnet logins (not supported in FIPS mode) ····························································································· 63
Configuring source IP-based Telnet login control······························································································· 63
Configuring source/destination IP-based Telnet login control·········································································· 63
Configuring source MAC-based Telnet login control ························································································ 64
Telnet login control configuration example ········································································································ 64
Configuring source IP-based SNMP login control ······································································································ 65
Configuration procedure ······································································································································ 65
SNMP login control configuration example ······································································································· 66
Configuring Web login control (not supported in FIPS mode)·················································································· 67
Configuring source IP-based Web login control································································································ 67
Logging off online Web users······························································································································ 67
Web login control configuration example·········································································································· 68
Configuring FTP··························································································································································69
FIPS compliance ····························································································································································· 69
Using the device as an FTP client································································································································· 69
Establishing an FTP connection···························································································································· 69
Setting the DSCP value for IP to use for outgoing FTP packets········································································· 71
Managing directories on the FTP server ············································································································· 71
Working with the files on the FTP server············································································································· 71
Switching to another user account ······················································································································ 72
Maintaining and troubleshooting the FTP connection ······················································································· 72

iii
Terminating the FTP connection ··························································································································· 73
FTP client configuration example························································································································· 73
Using the device as an FTP server································································································································ 74
Configuring basic parameters ····························································································································· 75
Configuring authentication and authorization ··································································································· 75
Associating an SSL server policy with the FTP service ······················································································ 76
FTP server configuration example························································································································ 77
Displaying and maintaining FTP··································································································································· 78
Configuring TFTP························································································································································79
FIPS compliance ····························································································································································· 79
Prerequisites···································································································································································· 79
Using the device as a TFTP client ································································································································· 79
Displaying and maintaining the TFTP client ················································································································ 80
TFTP client configuration example································································································································ 81
Managing the file system ··········································································································································83
File name formats··························································································································································· 83
Managing files ······························································································································································· 83
Displaying file information ··································································································································· 84
Displaying file contents········································································································································· 84
Renaming a file······················································································································································ 84
Copying a file························································································································································ 84
Moving a file·························································································································································· 84
Deleting/restoring a file ······································································································································· 85
Emptying the recycle bin ······································································································································ 85
Verifying the correctness and integrity of a file ································································································· 85
Managing directories ···················································································································································· 85
Displaying directory information ························································································································· 85
Displaying the current working directory············································································································ 86
Changing the current working directory············································································································· 86
Creating a directory·············································································································································· 86
Removing a directory············································································································································ 86
Managing storage media ············································································································································· 86
Managing storage medium space······················································································································· 86
Displaying and maintaining the NAND Flash memory ···················································································· 87
Performing batch operations········································································································································· 87
Setting the file system operation mode ························································································································ 88
File system management examples ······························································································································ 88
Managing configuration files····································································································································90
Overview········································································································································································· 90
Configuration types··············································································································································· 90
Configuration file format and content ················································································································· 91
Startup configuration loading process ················································································································ 92
FIPS compliance ····························································································································································· 93
Saving the running configuration ································································································································· 93
Enabling configuration file auto-update·············································································································· 93
Saving configuration by using different methods······························································································· 93
Using automatic configuration backup after a software upgrade ··································································· 94
Configuring configuration rollback ······························································································································ 95
Configuration task list ··········································································································································· 95
Configuring configuration archive parameters ·································································································· 96
Enabling automatic configuration archiving······································································································· 97
Manually archiving running configuration ········································································································· 97
Performing configuration rollback ······················································································································· 97

iv
Specifying a configuration file for the next startup····································································································· 98
Backing up the next-startup configuration file to a TFTP server················································································· 98
Deleting the next-startup configuration file ·················································································································· 99
Restoring the next-startup configuration file from a TFTP server················································································ 99
Displaying and maintaining a configuration file ······································································································100
Upgrading software················································································································································ 101
FIPS compliance ···························································································································································101
Software upgrade methods·········································································································································101
Upgrading Boot ROM without performing ISSU·······································································································102
Upgrading system software without performing ISSU (method 1)··········································································103
Upgrading system software without performing ISSU (method 2)··········································································103
Upgrading software by installing hotfixes·················································································································104
Basic concepts ·····················································································································································104
Patch states···························································································································································105
Hotfix configuration task list·······························································································································107
Installation prerequisites ·····································································································································107
Installing and running a patch in one step ·······································································································108
Installing a patch step by step ···························································································································109
Uninstalling a patch step by step·······················································································································110
Displaying and maintaining software upgrade ········································································································111
Software upgrade examples·······································································································································111
Non-ISSU software upgrade example···············································································································111
Hotfix configuration example·····························································································································113
Performing ISSU ······················································································································································ 114
Overview·······································································································································································114
ISSU upgrade procedure····································································································································114
ISSU states····························································································································································115
System software version rollback·······················································································································116
Performing an ISSU······················································································································································116
ISSU upgrade task list ·········································································································································116
ISSU upgrade prerequisites································································································································117
Displaying version compatibility························································································································117
Performing an ISSU for a compatible version ··································································································118
Performing an ISSU for an incompatible version·····························································································119
Setting the ISSU version rollback timer ·············································································································120
Performing a manual version rollback ··············································································································120
Displaying and maintaining ISSU······················································································································120
ISSU upgrade example··········································································································································· 122
Network status······························································································································································122
Network requirements ·················································································································································122
Upgrade procedure ·····················································································································································123
Configuring link aggregation·····························································································································123
Configuring the TFTP server································································································································125
Downloading the new system software image·································································································125
Checking all IRF member switches before the ISSU upgrade·········································································126
Viewing the version compatibility······················································································································128
Performing compatible ISSU upgrade···············································································································129
Performing incompatible ISSU upgrade············································································································130
Managing the device·············································································································································· 131
Configuring the device name ·····································································································································131
Changing the system time ···········································································································································131
Configuration guidelines ····································································································································131

v
Configuration procedure ····································································································································134
Enabling displaying the copyright statement ············································································································134
Configuring banners····················································································································································135
Banner message input modes ····························································································································135
Configuration procedure ····································································································································136
Configuring the exception handling method·············································································································136
Rebooting the device ···················································································································································136
Rebooting devices immediately at the CLI ········································································································137
Scheduling a device reboot ·······························································································································137
Scheduling jobs····························································································································································138
Job configuration approaches ···························································································································138
Configuration guidelines ····································································································································138
Scheduling a job in the non-modular approach ······························································································139
Scheduling a job in the modular approach ·····································································································139
Configuring the power-saving function······················································································································140
Enabling the power-saving function ··················································································································140
Configuring power-saving status ·······················································································································140
Configuring the port status detection timer················································································································141
Configuring temperature thresholds for a device ·····································································································141
Clearing unused 16-bit interface indexes··················································································································142
Disabling password recovery capacity ·····················································································································143
Verifying and diagnosing transceiver modules ········································································································143
Verifying transceiver modules ····························································································································143
Diagnosing transceiver modules························································································································144
Disabling alarm traps for transceiver modules·································································································144
Displaying and maintaining device management····································································································144
Automatic configuration ········································································································································· 146
Typical application scenario·······································································································································146
How automatic configuration works ··························································································································147
Automatic configuration work flow ···················································································································147
Using DHCP to obtain an IP address and other configuration information ··················································148
Obtaining the configuration file from the TFTP server ·····················································································149
Executing the configuration file··························································································································151
Index ········································································································································································ 152

1
Using the CLI
At the command-line interface (CLI), you can enter text commands to configure, manage, and monitor
your device.
Figure 1 CLI example
Logging in to the CLI
You can log in to the CLI in a variety of ways. For example, you can log in through the console port, or
by using Telnet or SSH. For more information about login methods, see "Logging in to the CLI."
Command conventions
Command conventions help you understand the syntax of commands. Commands in product manuals
comply with the conventions listed in Table 1.
Table 1 Command conventions
Convention Descri
p
tion
Boldface Bold text represents commands and keywords that you enter literally as shown.
Italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars, from which
you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical bars, from
which you select one or none.
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by vertical
bars, from which you select at least one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optional syntax choices separated by vertical
bars, from which you select one choice, multiple choices, or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&) sign can
be entered 1 to n times.

2
Convention Descri
p
tion
# A line that starts with a pound (#) sign is comments.
Command keywords are case insensitive.
The following example analyzes the syntax of the clock datetime time date command according to Table
1.
Figure 2 Understanding command-line parameters
For example, to set the system time to 10:30:20, February 23, 2011, enter the following command line
at the CLI and press Enter:
<Sysname> clock datetime 10:30:20 2/23/2011
Using the undo form of a command
Most configuration commands have an undo form for canceling a configuration, restoring the default, or
disabling a feature. For example, the info-center enable command enables the information center, and
the undo info-center enable command disables the information center.
CLI views
Commands are grouped in different views by function. To use a command, you must enter the view of the
command.
CLI views are organized in a hierarchical structure, as shown in Figure 3. Each view has a unique prompt,
from which you can identify where you are and what you can do. For example, the prompt
[Sysname-vlan100] shows that you are in the view of VLAN 100 and can configure attributes for the
VLAN.
You are placed in user view immediately after you are logged in to the CLI. The user view prompt is
<Device-name>, where the Device-name argument defaults to Sysname and can be changed by using
the sysname command. In user view, you can perform some basic operations, including display, debug,
file management, FTP, Telnet, clock setting, and reboot. For more information about the sysname
command, see Fundamentals Command Reference.
From user view, you can enter system view to configure global settings, including the daylight saving time,
banners, and hotkeys. The system view prompt is [Device-name].
From system view, you can enter different function views. For example, you can enter interface view to
configure interface parameters, enter VLAN view to add ports to the specific VLAN, enter user interface
view to configure login user attributes, or create a local user and enter local user view to configure
attributes for the local user.
To display all commands available in a view, enter a question mark (?) at the view prompt.

3
Figure 3 CLI view hierarchy
Entering system view from user view
Task Command
Enter system view from user view. system-view
Returning to the upper-level view from any view
Task Command
Return to the upper-level view from any view. quit
Executing the quit command in user view terminates your connection to the device.
NOTE:
In public key code view, use the public-key-code end command to return to the upper-level view (public
key view). In public key view, use the peer-public-key end command to return to system view.
Returning to user view from any other view
You can return to user view from any other view by using the return command, instead of using the quit
command repeatedly. Pressing Ctrl+Z has the same effect.
To return to user view from any other view:
Task Command
Return to user view. return

4
Accessing the CLI online help
The CLI online help is context sensitive. You can enter a question mark at any point of a command to
display all available options.
To access the CLI online help, use one of the following methods:
•Enter a question mark at a view prompt to display the first keywords of all commands available in
the view. For example:
<Sysname> ?
User view commands:
archive Specify archive settings
backup Backup next startup-configuration file to TFTP server
boot-loader Set boot loader
bootrom Update/read/backup/restore bootrom
cd Change current directory
…
•Enter some keywords of a command and a question mark separated by a space to display
available keywords and arguments.
{Example 1: The question mark is in the place of a keyword, and the CLI displays all possible
keywords with a brief description for each keyword.
<Sysname> terminal ?
debugging Send debug information to terminal
logging Send log information to terminal
monitor Send information output to current terminal
trapping Send trap information to terminal
{Example 2: The question mark is in the place of an argument, and the CLI displays the
description of the argument.
<Sysname> system-view
[Sysname] interface vlan-interface ?
<1-4094> VLAN interface
[Sysname] interface vlan-interface 1 ?
<cr>
[Sysname] interface vlan-interface 1
The string <cr> indicates that the command is complete, and you can press Enter to execute the
command.
•Enter an incomplete keyword string followed by a question mark to display all keywords starting
with the string. For example:
<Sysname> f?
fixdisk
format
free
ftp
<Sysname> display ftp?
ftp
ftp-server
ftp-user

5
Entering a command
When you enter a command, you can use some keys or hotkeys to edit the command line, or use
abbreviated keywords or keyword aliases.
Editing a command line
You can use the keys listed in Table 2 or the hotkeys listed in Table 3 to edit a command line.
Table 2 Keys for editing a command line
Ke
y
Function
Common keys If the edit buffer is not full, pressing a common key inserts the character at the
position of the cursor and moves the cursor to the right.
Backspace Deletes the character to the left of the cursor and moves the cursor back one
character.
Left arrow key or Ctrl+B Moves the cursor one character to the left.
Right arrow key or Ctrl+F Moves the cursor one character to the right.
Tab
If you press Tab after entering part of a keyword, the system automatically
completes the keyword:
•If a unique match is found, the system substitutes the complete keyword for
the incomplete one and displays what you entered in the next line.
•If there is more than one match, you can press Tab repeatedly to choose
the keyword you want to enter.
•If there is no match, the system does not modify what you entered but
displays it again in the next line.
Entering a STRING type value for an argument
Generally, a STRING type argument value can contain any printable character (in the ASCII code range
of 32 to 126) other than the question mark (?), quotation mark ("), backward slash (\), and space.
However, a specific STRING type argument might have more strict requirements. For example, the
domain name is of the STRING type. Invalid characters for it include the vertical bar (|), slash (/), colon
(:), asterisk (*), less-than sign (<), greater-than sign (>),and at sign (@), as well as the question mark (?),
quotation mark ("), backward slash (\), and space. For more information about the specific requirements
for a STRING type argument, see the relevant command reference.
<Sysname> system-view
[Sysname] domain ?
STRING<1-24> Domain name
Abbreviating commands
You can enter a command line quickly by entering incomplete keywords that can uniquely identify the
complete command. In user view, for example, commands starting with an sinclude startup
saved-configuration and system-view. To enter system view, you only need to enter sy. To set the
configuration file to be used at the next startup, you can enter st s.
You can also press Tab to have an incomplete keyword automatically completed.

6
Configuring and using command keyword aliases
The command keyword alias function allows you to replace the first keyword of a non-undo command or
the second keyword of an undo command with your preferred keyword when you execute the command.
For example, if you configure show as the alias for the display keyword, you can enter show to execute
a display command.
Usage guidelines
•After you successfully execute a command by using a keyword alias, the system saves the keyword,
instead of its alias, to the running configuration.
•If you press Tab after entering part of an alias, the keyword is displayed.
•If a string you entered partially matches a keyword and an alias, the command indicated by the
alias is executed. To execute the command indicated by the keyword, enter the complete keyword.
•If a string you entered exactly matches a keyword but partially matches an alias, the command
indicated by the keyword is executed. To execute the command indicated by the alias, enter the
complete alias.
•If you enter a string that partially matches multiple aliases, the system gives you a prompt.
Configuration procedure
To configure a command keyword alias:
Ste
p
Command Remarks
1. Enter system view. system-view N/A
2. Enable the command
keyword alias function. command-alias enable By default, the command keyword
alias function is disabled.
3. Configure a command
keyword alias. command-alias mapping cmdkey
alias
By default, no command keyword
alias is configured.
You must enter the cmdkey and
alias arguments in their complete
form.
Configuring and using hotkeys
To facilitate CLI operation, the system defines some hotkeys and provides five configurable command
hotkeys. Pressing a command hotkey equals entering a command. For system-reserved hotkeys, see Table
3.
To configure hotkeys:
Ste
p
Command Remarks
1. Enter system view. system-view N/A

7
Ste
p
Command Remarks
2. Configure hotkeys. hotkey { CTRL_G | CTRL_L |
CTRL_O | CTRL_T | CTRL_U }
command
By default:
•Ctrl+G is assigned the display
current-configuration
command.
•Ctrl+L is assigned the display ip
routing-table command.
•Ctrl+O is assigned the undo
debugging all command.
No command is assigned to Ctrl+T
or Ctrl+U.
3. Display hotkeys. display hotkey [ | { begin |
exclude | include }
regular-expression ]
Optional.
Available in any view. See Table 3
for hotkeys reserved by the system.
The hotkeys in Table 3 are defined by the device. If a hotkey is also defined by the terminal software that
you are using to interact with the device, the definition of the terminal software takes effect.
Table 3 Hotkeys reserved by the system
Hotke
y
Function
Ctrl+A Moves the cursor to the beginning of the line.
Ctrl+B Moves the cursor one character to the left.
Ctrl+C Stops the current command.
Ctrl+D Deletes the character at the cursor.
Ctrl+E Moves the cursor to the end of the line.
Ctrl+F Moves the cursor one character to the right.
Ctrl+H Deletes the character to the left of the cursor.
Ctrl+K Aborts the connection request.
Ctrl+N Displays the next command in the command history buffer.
Ctrl+P Displays the previous command in the command history buffer.
Ctrl+R Redisplays the current line.
Ctrl+V Pastes text from the clipboard.
Ctrl+W Deletes the word to the left of the cursor.
Ctrl+X Deletes all characters to the left of the cursor.
Ctrl+Y Deletes all characters to the right of the cursor.
Ctrl+Z Returns to user view.
Ctrl+] Terminates an incoming connection or a redirect connection.
Esc+B Moves the cursor back one word.
Esc+D Deletes all characters from the cursor to the end of the word.
Esc+F Moves the cursor forward one word.
Esc+N Moves the cursor down one line. This hotkey is available before you press Enter.

8
Hotke
y
Function
Esc+P Moves the cursor up one line. This hotkey is available before you press Enter.
Esc+< Moves the cursor to the beginning of the clipboard.
Esc+> Moves the cursor to the ending of the clipboard.
Enabling redisplaying entered-but-not-submitted commands
After you enable redisplaying entered-but-not-submitted commands:
•If you entered nothing at the command-line prompt before the system outputs system information
such as logs, the system does not display the command-line prompt after the output.
•If you entered some information (except Yes or No for confirmation), the system displays a line
break and then display what you have entered after the output.
To enable redisplaying entered-but-not-submitted commands:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable redisplaying
entered-but-not-submitted
commands. info-center synchronous
By default, the feature is disabled.
For more information about this
command, see Network
Management and Monitoring
Command Reference.
Understanding command-line error messages
If a command line fails the syntax check, the CLI displays error messages.
Table 4 Common command-line error messages
Error messa
g
e Cause
% Unrecognized command found at '^' position. The keyword in the marked position is invalid.
% Incomplete command found at '^' position. One or more required keywords or arguments are
missing.
% Ambiguous command found at '^' position. The entered character sequence matches more than one
command.
Too many parameters The entered character sequence contains excessive
keywords or arguments.
% Wrong parameter found at '^' position. The argument in the marked position is invalid.